Selective extraction of scandium from transition metals by synergistic extraction with 2-thenoyltrifluoroacetone and tri-n-octylphosphine oxide

Zhigang Zhao, Fukiko Kubota, Noriho Kamiya, Masahiro Goto

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

There has been an increasing demand for scandium (Sc). However the supply is insufficient because the separation and recovery of Sc as a byproduct from ores is difficult. In this study, extraction and separation of Sc3+ from a sulfuric acid solution containing transition metals such as Al3+, Fe3+, Mn2+, Co2+, Ni2+ and Zn2+ was investigated using a β-diketone, HTTA and a neutral extractant, TOPO. Due to the synergistic effect with the two extractants, Sc3+ was effectively and selectively separated even from Fe3+, the separation of which is difficult with HTTA alone. The extraction mechanism was examined and it was revealed that Sc3+ is extracted with three HTTA and one TOPO molecules. Scandium was readily stripped from the extracting phase by 1 M sulfuric acid. The potential use of the combination of the β-diketone with TOPO for the recovery of Sc3+ in a refining process was demonstrated.

Original languageEnglish
Pages (from-to)137-143
Number of pages7
JournalSolvent Extraction Research and Development
Volume23
Issue number2
DOIs
Publication statusPublished - 2016

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Fingerprint Dive into the research topics of 'Selective extraction of scandium from transition metals by synergistic extraction with 2-thenoyltrifluoroacetone and tri-n-octylphosphine oxide'. Together they form a unique fingerprint.

Cite this